Flying-machine propeller



May 1, 1923.

1,453,951 J. M. RAYMOND FLYING MACHI NE PROPELLER Filed Oct. 28, 1921 2Sheets-Sheeii 1 oooo oooooo cs 0000000000 oooooooooo ooooooocooooooosocoo oooo0oo WITNESSES; ATTORNEY J. M. RAYMOND FLYING MACHINEPROPELLER May 1, 1. 923.

Filed Oct. 28, 1921 2 Sheets-Sheet 2 INVENTOR ATTORNEY WITNESSES;

Patented may 1, 1923'.

STATES JOHN MORTIMER RAYMOND, OF NEW QRLEANS, LOUISIANA.

FLYING-MACHINE PROPELLER.

Application filed October 28, 1921. Serial No. 511,209.

a State of Louisiana, have invented new and useful Improvements inFlying Machine Propellers, of which the following is a specification.

The object of my present invention is the provision of a simple,efiicient and durable propeller, designed more especially, though notnecessarily, for use in conjunction with flying machines.

To the attainment of the foregoing,the invention consists in theimprovement as hereinafter described and definitely claimed.

In the accompanying drawings, forming part of this specification Figure1 is a side elevation of the propeller constituting the best practicalembodiment of my invention of which I am cognizant.

Figure 2 is a longitudinal section of the same with parts in elevation.

Figure 3 is a plan view with the apertured annulus and the coverremoved.

Figure 4 is a broken view of the spiral screen.

Figure 5 is a plan view of the. adjusting tie rods.

Similar numerals of reference designate corresponding parts in all ofthe views of the drawings. I

Among other elements my improvement comprises a cone-shaped casing 9.The wall of the said casing 9 is made quite thin as illustrated, and thecasing is tapered from one of its ends to a point adjacent to itsopposite end as clearly illustrated. In an annulus 4 bolted at 5 to the:comparatively large portion of the casing or envelope are formedopenings 3 for the entrance of air, and in the center of the cover 2 onthe annulus 4 is a cup in which is an appropriate bearing 1. At 10 thecasing is rovided with exhaust apertures, arranged iametrically oppositeeach other. It will also be noted that at the inner end of the casing 9is a conical deflector 15 the apex of which is arranged adjacent to theapertures 10 with a view to deflecting air through the said apertures10. I would also have it understood at this point that the deflector 15serves to lend increased strength to the mounting of the small end ofthe double spiral screw 6 carried by a shait 1a which. is preferablythough not necessarily tubular. Appropriately connected with the smallportion of the casing 9 and communicating with the apertures 10 areadjustable elbows 11 screwed on ends of outlets 12 and 13 loosely to beset at any angle for driving, lifting or steering. The said outlets 12and 13 communicate with and extend in diametricallyopposite directionsfrom a cylinder 15 in which the lower end of the casing 9 is disposed.

Appropriately fixed in the casing 9 are annular deflecting bafiles 7,Figure 2, designed to prevent too free escape of air thrown against theside of the envelope or casmg 9, and also designed to direct such airback into the double spiral screw which extends the full length of thecone-shaped casing or envelope 9, as shown. The baflles 7 being groovedor of channel form in section and 'the screw 6 being tapered air iscompressed in the casing 9 and driven through the lower end thereof.

Fixed on the shaft 14: are lower and uppercollars 16 and 17, and movableor'adjustable on said shaft 14 in the direction of the length thereof isa collar 19! The blades of the double spiral screw have lips 19* attheir upper ends to receive rods 20 with eyes 21 at their outer ends.The innerends of the said mods 20 have arms 22 arranged in and connectedto flanges on the .collar 19. The rods 15 include turnbuckles as shownand have inner, lateral arms 23 extending through and connected toflanges on "the collar 17. Thus the collar 19 can be properly positionedand adjustably fixed relative to the shaft 14:.

At 24 in Figure 1 are rivets through the medium of whichthe bafiles 7are preferably connected to the casing or envelope 9.

While I show my novel propeller in upright position, it is to beunderstood that the propeller is susceptible of being used in variouspositions.

I have entered into a detailed description of the construction andrelative arrangement of'the parts embraced in the present and preferredembodiment of my invention in order toimpart a full, clear and exactunderstanding of the said embodiment. I do not desire, however, to beunderstood as confining myself to the specific construction and relativearrangement of parts inasmuch as in the future practice of the inventionvarious 3 changes and modifications may be made such as fall within thescope of my invention as defined in my appended claim.

Having described my invention, what I claim and desire to secure byLetters- Patent, is 1- In a propeller, the combination of a shaft,spiral blades associated With'the shaft, rods connected with ends ofsaid blades, a collar adjustable 0n the shaft and to which said rods areconnected, a collar fixed on the shaft adjusting rods interposed betweensaid collar and the outer ends of the first-named rods, and a casingenclosing said shaft blades and connections.

In testimony whereof I afiix my signature.

JOHN MORTIMER RAYMOND. I

